Duplex strainer



July 18, 1933. K' MUHLEISEN 1,919,031 '4 DUPLEX STRAINER Filed March 5l, 1931 Patented july i8, 1933 @m AIA.

Lenen 'earner oser-CE BEEN, OF PHILADELPHIA, PN'E, 'LVAN/, SSIGIQ'OR TO SCHUTTE-Am 9F PHILADFLPH'A, PENNS'YLVANI A ooRPonA'TIoN' oF AIN'ER Application -ed March 31, 1931. Serial No. 526,656.

ntion relatesl to strainers for use ing; of liquids i'or 'the purpose of l' 'ther from matter or material in the forni V'mips or particles of foreign matti it may be desired to remove. is of duplex valve type and is in the .straining of oils, Water uds to clean the same.

` object ofthe invention einer zu duplexY type o" rein the casings of t.

are so related and connectns to facilitate the proeucing thereof :ze a e; gie integral casting.

't also is an object of 'the invention to provide au improvement in the means for enablnigg; or f ierini'ting access to the interiors of he ras-ings o' the respective strainers of the lcouple for the purpose of cleaning the A sil tu er object of the invention is to gir vide an nnprovement in the means for adjusting the valves of the two 'strainers simultaneously in either of two `'directions for the purpose of controlling the 'flow of a lion 5 d through the strainer. 1 To the foregoing and other ends the invention comprehends the construction find arrangement as 'hereinafterdescribed' in detail, particularly pointed out in thev claims and as illustrated in the drawing wherein I have shown one mechanical embodiment ofthe invention in a form which at present' is'preferred by me. However, it shoulfdbe understood that the invention may be embodied in constructions other than that disclosed and that changes in the details of construction may be made Within the scope of the claims without departing from the invention or the principle thereof.

In the drawing:

l is a View partly inl .elevation and partly in vertical sectional elevation;

Fig. 2 is a View partly in top plan and partly in transverse section;

Fig. 3 is a vertical sectional View taken on the line 3 3 of Fig. 1;

Fig. i is a verticall sectional Viewtaken on the line 4 4 of Fig. l; and

Fig. 5 is a top plan View of a strainer er ployed within the casings of the strainer etructure.

ln the drawing .l have shown a frame structure eomprisinpy casings l and 2 which are'v located in adjoining relation to each other'as' shown and which are rigidly connected' to each other by the intermediate connecting means indicated as a Whole by the numeral 3. "'lh-e e( meeting means is provided'with upper' and lo w erchambers and 5. Openings or'pasways 3 and lead 'from the oppositeside's the. chamber 4 into the upper ends of the chambers provided by the casings l' and 2." ugs or passageivays 8`and`9 leady from sings and 2 into the lower chaxnber' previously referred to. These chambers are separati l E i irom each other by the upwardly' and cro s wise extending partition W'all'lO.4 The upper end of the chamber 4 is closed by means of a stationary plate 11 which is adapt- 7 ed to be held and fastened in closed position by means of ustable binding screws '1 2'0'tl which there are in the construction shown three. rThese adjustable binding'screws are mounted in a cross bar 13v Which is located 75 the upper open end of the chamber?! and retained in place by means o'lf headed holes 14 which are secured in opposed'relatio'nj to each otherl in .the upper edge ofthe wall of e said chamber 4. The plate 11 maybe renjioifed by removing the headed bolts vl'i'to permit the removal of the cross bar'13ly The lower open end of the chamber 5`is closed vby a similar cover plate-15 whichl is held in closed position by means ofiadjustable binding screws 16 which are in adjustable engagement with the cross bar 17 which extends below and in lengthwise relation to the cover plate l5 and is mounted at its opposite end-s upon headed bolts 18 which are'r'emovably secured to the lower edges of the wells of the chamber 5. The top? open' ends or" the chambers of the casings l and -2 vare respectively closed by means of coverheads' or plates 2l which are removably retained in place in closed position by means of adjustable binding` and holding screws 22 'which are adjustably mounted in the bars 23W"h`i ':h are supported-.at their opposite ends" upon pins or rods 24 which extend through op'en- 100 ings provided in upright posts 25 which are secured at their lower ends to the top portions of the casings 1 and 2. rIhere are two of these cross bars associated with the top end of each ot the casings 1 and 2. Each cross bar is provided at its opposite ends with slots or openings 30 within which portions of the supporting posts 25 are located. Horizontal openings are provided through the opposite ends ot the bars 23 and through the posts 25 as indicated in the drawing. The pins 24 extend through these openings and secure the bars to the supports 25. By removal of the pins 24 the bars 23 may be removed to thereby permit the removal of the cover heads or plates 21.

Strainers are located in the chambers of each of the casings 1 and 2. These strainers are of identical construction, though such identity is not ot the essence of the invention. Each of the strainers comprises two liquid straining elements or parts, 35 and 36. The strainers ot each of the strainer structures are ot' oblong shape as best shown in Fig. 2 of the drawing. The lower ends ot` the respective strainers 35 and 36 ot each strainer structure are closed while the upper ends thereof are open and are secured within openings 37 provided in the respective plates 38 which are supported within the chambers of the casings 1 and 2 near the upper ends thereof. The openings through the respective plates 38 are spaced from each other as shown so that the strainers 35 and 36 of the respective strainer structures are spaced from each other. This relationship is best shown in Fig. 2 of the drawing. For the purpose ot readily removing the strainer structures from the chambers of the casings when the cover heads or plates 21 are removed, I have provided the plates 38 with handles 40 which project upwardly therefrom. These handles preferably are of a height such that when the cover plates or heads 21 are in place the lower sides thereof contact with the upper sides of the handles and operate to hold the plates 38 and the strainers supported thereby in position as shown in Figs. 1 and 4 of the drawing.

The liquid to be treated is supplied from any source of supply kthrough the inlet port 2O to 'the chamber 4. From the latter it flows outwardly through the outlet openings 6 and 7 into the upper portions of the chambers ot the casings 1 and 2. From the upper portions of the said casings the liquid ilows into the upper open ends of the strainers 35 and l36 and through the meshes thereof into the chambers of the casings 1 and 2 below the plates 38. The liquid thus entering the portions of the chambers of the casings 1 and 2 below the plates 38 flows from the said chambers out through the openings 8 and 9 into the chamber 5 and thence through an outlet port 41. From theoutlet port 41 the liquid is conveyed through a tube or conduit,

not shown, to its selected destination. For the purpose of cont-rolling the flow of liquid from the chamber 4 into the upper portions of the chambers of the casings 1 and 2 and the out-flow of the liquid from the lower portions of the said chambers through the openings 8 and 9 into the chamber 5, I have provided valves 45 and 46 located respectively in the chambers 4 and 5. As illustrated, these valves are shown in positions midway of the opposite sides ot the chambers 4 and 5 with both of the openings 6 and 7 and 8 and 9 open. The valves 45 and 46 are supported upon rods or bars 47 and 48 which are mounted at their inner ends in bearings 50 provided in indented portions of the inner walls of the casings 1 and 2. The bearings of both pairs of bearings are located relatively close together so that there is little likelihood of deflection of the portions oit the rods or bars 47 and 48 between the said bearings. By this means the valves 45 and 46 are held rigidly in position and are not permitted to vibrate or tilt. The outer end portions of the said rods or bars are mounted in bearings 51 consisting of openings provided in the oppositely disposed portions of the outer wall of the casing 2. To prevent leakage of liquid through the openings or bearings 51 I have provided recesses 52 in the outer sides of the wall of the casing 2 in alignment with the bearing openings 51 within which is located packing material held in place by glands 54 in known manner. The valves 45 and 46 may be adjusted simultaneously in either ot' two directions, toward the left or toward the right, to close the openings 6 and 8 or 7 and 9. For the purpose of simultaneously adjusting the rods or bars 47 and 48 lengthwise to effect or cause simultaneous corresponding movements of the valves 45 and 46, I have provided a threaded stud or bolt 55 with which a sleeve 56 is in screw-threaded engagement. The said sleeve is rotatably supported in an opening or bearing 57 which extends through a cross bar or cross head 58 which is connected its opposite ends to the outer ends of the rods or bars 47 and 48. The connection between the cross bar 58 and the sleeve 56 is loose so that there may be a limited amount of play between the two, and likewise. the connections between the opposite ends of the cross bar 58 and the outer ends of the rods or bars 47 and 48 are loose so that there may be a limited amount of play between the said cross bar and the said rods or bars 47 and 48. It will be noticed that the width between the shoulders at the outer ends of the rods or bars 47 and 48 and the inner sides of the nuts secured to the extreme outer ends ot the said rods or bars is slightly wider than the thickness of the ends of the cross bar The purpose of making these connections so Lmegoar that theremay'be a limited-t amount of play isto insure' that the valves45' and-46=sliall always Contact with their respectiveV seats even though the; planes of the upper and lower seats v'should be slightly displaced with reference to each other. Assume for the moment that the valves 45Y and 46 have been adjusted toward the left to close the openings 6 and 8 and lthat the plane ofthe seat for the valves 48 with which it contacts to close the ope-ning 6 is slight'ly'nearer to the medial plane ofy the chambers 4; and 5 than is the corresponding seat for the valve 46; It would` fellow. thatA the valve45 would first be seated leaving' the va'l-ve46 spaced slightly from itsl seat. If, however', the' 'connections between the cross bar 58' and' the sleeve 56 and bctweenlthe opposite ends ofthe cross bar 58 and "the outer ends of the rods o-rbars 47 and 48 are l'ooseasab'ove describedjit will be apparent that uponthe continuedY operation of the sleeve 56 the cross bar 58 will be slightly tilted in o rdcr to cause'additional adjustment of the rod or bar 48 to effect complete elosurc'of the valve 46. rlhe same operation would take place with resoectto the 'valve 45 under similar conditions. It will be seen, therefore, tha-t1' have provided means whereby'both valves 45 yand 46 may be positively and fully closed` notwithstanding slight displacements of the vertical planes of the respectivel valve seats `with relation to each other. fr notti() is secured tothe inner end of the sleeveft to retain-the latter in the opening, or bearing: 57.- 4 For the purpose of rot-ating the sleeve 561 have provided a handwheel 6l. The .sleeve -56 is so mounted as toLpermit,,rotationthereof but it is prevented from lengthwise or axial movement relatively to thecross bar 58. and to-the rods or bars 47 and. 48. Upon rotation of the said sleeve 56 it is movedinonedirectionor the other lengthwise of the screw-threaded posti5`5, depending uponthe direction of rotatiom to thereby cause lengthwise movement of the rods or bars 47 and 48. The movement of these bars operates to adjust the valves and 46 within the chambers 4 and 5 to control the passage of liquid through the said chambers. It will be apparent that adjustment of the valves 45 and 46 may be ei'iected readily and quickly and that both valves are simultaneously thrown into positions to close the openings as above described or into positions in which the said (,pei'iings are open.

rihe position of the sleeve 56 with reference to the threaded bolt will indicate the .iositions of the valves 45 and 46 in the chambers 4 and hence it will be seen that I have prmfided convenient means for indicating to anyone in charge of the strainer the positions of the valves 45 and 46 with respect to tfie openings which't-hey are intended-'to control.

Iii View of the fact; that both valves are caused to'move simultaneously bythe actuationof a single instrumentality it will be-apparent that no one in charge may inadvertently closeone valve and leave the other ope-n'. In other words the construction and operation of the device lare of a character such t-h-at mistakes cannot. be made in the opening and the closing of one valve with respect to theother.

I'nicase itisliouldliecomenecessary to have access toene-or the other Aof the chambers of casings l' and Qifor-the purpose of'cleaning or repairing'the-same, the valves 45`may move intoipesitions to close the openings between the chambers 4 and 5 and the chamber of the casingwhich it is desired to clean or in w-hliclrit is desiredlto make repairs. In such case the otherside of the strainer structure may continue to operate. It is very convenient and of great advantage to be able to operate simultaneously bo-th valves either into a closed position or into an open position. The means employed by mev for that purpose is characterized by its simplicity and by the facility with whichit may be operated.

Eitherofthe cover plates l1 or l5 may be readily removed'to permit access to the chambers 4 or 5; lt will be noted" that the lower open' end'ofl` the chamber 5 is located in a plane which extends upwardly at an angle to a vertical line and'also that the said' lower cnd'is located azdistan'ce from the lower end of the structure as a whole.. By this means access may be hadto the interior'of the chamber 5 upon removal ofthe cover plate l5. It is very desirable that access may be had not onlyto the upper chamber 4 but also to the lower chamber without the necessity of disturbingany portion of the structure other thanl the removal of thecover`- plates 11 and 15.

Theelowerends ofthe casings l and 2 may be provided with projections 62 by which the strainer structure may be supported upon any suitable support.

As already indicated I have provided a casing of a structure such that it may be produced in a Single integral casting thereby not only being enabled to produce the casing economically but also being' enabled to produce a casing which is rigid and rugged.

Having thus described my invention what l claim and desire to secure by Letters Patent 1s:

l. A duplex strainer for straining liquids comprising a couple of casings, means located between and Connected to the said casings for holding the same in fixed relation to each other, the said means being provided with liquid inlet and outlet chambers one of which is located in adjoining relation to the upper ends of the said casings and the other of which is located in adjoining relation to the lower ends of said casings, the upper end o f the former and the lower end of the latter being open, removable cover piates for closing the open ends of the said chambers, the lower end of the lower chamber being located in a plane extending upwardly and at an angle to a ver ical line to facilitate access to the said chamber upon removal of the cover plate therefrom, and valves for controlling` the flow of liquid through the said chambers.

2. A duplex strainer for straining liquids comprising a couple of casings, means located between and connected to the said casings for holding the same in fixed relation to each other, the said means being provided with liquid inlet and outlet chambers one of which is located in adjoining relation to the upper ends of the said casings and the other of which is located in adjoining relation to the lower ends of said casings, the upper end of the former and the lower end of 'the latter being open, removable'cover plates for closing the open ends of the said chambers, the lower end of the lower chamber being located in a piane extending upwardly and at an angle to a vertical line to facilitate access to the said chamber pon removal of the cover plate therefrom, spaced rods which are longitudinally movable the inner end portions of said rodsextending through the said chambers and the outer end portions thereof projecting through one of the said casings and terminating outside of the latter, valves mounted in the said chambers for controlling the flowd of liquid through the latter, and means having connection with the outer ends ofthe said rods for effecting simultaneous longitudinal adjustment thereof to cause corresponding adjustments of the said valves to control Athe How of liquid through the said chambers.

3. A duplex strainer for straining liquids comprising casings, means for connecting the said casings together, the said casings and means being embodied in a single integral casting, the said means being provided with liquid inlet and outlet chambers the Walls of which are provided With openings placing the said chambers in communication with the interiors of the said casings, one of the said chambers being located in adjoining relation to the upper ends of the said casing while the other thereof is located in adjoining relation to the lower ends of said casings, the top and bottom of the respective chambers being open, the open top of the upper chamber being located in a horizontal plane while the open top of the lower chamber is located in an inclined plane which extends at an angle to a vertical line, removable cover plates for closing the open top and bottom ends of the respective chambers, and Valves for controlling the flow of liquid through the said chambers into and from the interiors of the said casings.

4. A duplex strainer comprising a couple of casings having chambers therein, means for connecting and holding the said casings in rigid relation to each other, the said means being provided with inlet and outlet chambers, valves associated with said chainbers, longitudinally movable bars for supporting the said valves and means for actuating said bars for causing longitudinal movements thereof to adjust the said valves with respect to the said chambers to control the flow of liquid therethrough, the said single means comprising a stud having screw threads thereon and connected to said casing, a sleeve having screw threaded engagement with said stud, and a cross bar loosely connected to said sleeve and to said bars to permit a limited amount of play between said bars and said cross bar and between said cross bar and said sleeve.

KARL MUHTLEISEN. 

